• Journal of Korean Neurosurgical Society
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• 제40권5호
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• pp.381-383
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• 2006

Spinal extradural arachnoid cyst is uncommon and rarely cause neural compression. We report a rare case of severe cord compression due to septated spinal extradural arachnoid cyst. A 35-year-old woman has developed back pain 3 months prior to her visit, but recently motor weakness and urinary incontinence occurred. Magnetic resonance images showed an extradural cyst posterior to the cord, which was flattened and displaced from T12 to L2. Urgent decompressive laminectomy and cyst removal was performed. Histopathological examination confirmed that cyst wall was formed by nonspecific fibrous connective tissue without a single-cell layer of inner arachnoid lining. Motor weakness and voiding difficulty were recovered completely after operation.

• Journal of Korean Neurosurgical Society
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• 제39권6호
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• pp.443-446
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• 2006

Intracranial arachnoid cyst is presumed to be a developmental anomaly and its natural history is not well defined. Often it is detected incidentally in a asymptomatic patient and hemorrhagic events of arachnoid cyst following head injury are rarely reported. We report hemorrhagic complications including two intracystic hemorrhages, two subdural hematomas, and an epidural hematoma in 5 patients with intracranial arachnoid cyst after minor head injury and review pertinent literatures.

• Brain Tumor Research and Treatment
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• 제6권2호
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• pp.68-72
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• 2018

We report a rare case of arachnoid granulations mimicking multiple osteolytic bone lesions. A 66-year-old woman was admitted to a local clinic for a regular checkup. Upon admission, brain CT showed multiple osteolytic lesions in the occipital bone. These needed to be differentiated from multiple osteolytic bone tumor. Subsequent brain MRI revealed that the osteolytic lesions were isointense to cerebrospinal fluid, hyperintense on T2-weighted image, hypointense on T1-weighted image, and with subtle capsules around the osteolytic lesions that were visible after gadolinium injection. A bone scan revealed no radiotracer uptake. The lesions were in both the transverse sinuses and the torcular herophili. With typical radiological appearances of the lesions, the osteolytic lesions were diagnosed as multiple arachnoid granulations. No further treatment was planned. A 1-year follow-up brain CT scan revealed no change. We should consider the possibility of arachnoid granulations when multiple osteolytic lesions are observed in the occipital bone.

• 생물정신의학
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• 제8권1호
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• pp.153-155
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• 2001

There had been few reports of arachnoid cyst accompanying psychiatric disturbance and no report treated with low-dose risperidone administration. We report a patient, developed first-transient psychotic episode considered to be provoked by an arachnoid cyst, responsive to risperidone, which was found in the middle cranial fossa as follows. A 57-year-old man was admitted by suddenly developed headache, auditory hallucination, delusion of persecution and, an arachnoid cyst in the anteromedial aspect of middle cranial fossa was found on MRI after admission. The psychotic episode was first to him and he was also negative to other clinical evaluation including endocrine abnormality, his psychotic symtom was suspected to be induced by arachnoid cyst and was well controlled to low-dose risperidone administration. He left hospital free from psychotic symptoms on 14 hospital days.

• Journal of Yeungnam Medical Science
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• 제25권2호
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• pp.160-164
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• 2008

재태 38주에 시행한 산전 검사상 우연히 발견된 거미막 낭종을 가지고 태어난 생후 2개월된 여아가 지속적인 과민상태를 나타내었다. 이후 시행한 두부 전산화 단층촬영상 수두증을 동반하여 크기가 증가된 거미막 낭종이 관찰되었다. 우리는 상기 소견에 대하여 개두술하에 낭종 개창술을 시행하였으나 낭종의 크기가 줄어들지 않았고, 13개월 이후에 시행한 경과관찰에서 수두증이 악화된 소견을 보였다. 환아는 이후 낭종-복막간 단락술을 시행하였으며, 5년뒤 시행한 두부 자기공명영상에서 낭종의 크기 감소와 더불어 뇌수두증이 해소되었다. 거미막 낭종 자체의 크기가 증가하는 것은 드문 현상이며, 아직까지 이에 대한 명확한 수술적 치료는 나와 있지 않다. 우리는 이 증례를 통하여 수두증이 동반된 크기가 증가하는 거미막 낭종의 치료에 있어서 낭종-복강간 단락술이 적절한 수술적 치료법이 될 것으로 판단한다.

• Journal of Korean Neurosurgical Society
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• 제49권5호
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• pp.284-286
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• 2011

Glossopharyngeal neuralgia is a relatively rare condition characterized by severe, paroxysmal episodes of lancinating pain in the tongue, throat, ear, and tonsil. This disorder is assumed to be due to compression of the glossopharyngeal nerve by vascular structures. A 47-year-old woman complaining of sharp and lancinating pain in the right periauricular and submandibular areas visited our hospital. Swallowing, chewing, and lying on her right side triggered the pain. Her neurologic examination revealed no specific abnormalities. The results of routine hematologic and blood chemistry studies were all within normal limits. Carbamazepine and gabapentin were given, but her symptoms persisted. Her pain was temporarily relieved only by narcotic pain medication. MRI showed an arachnoid cyst located in the right cerebellomedullary cistern extending to the cerebellopontine cistern. Cyst removal was performed via a right retrosigmoid approach. Lateral suboccipital craniotomy was performed using the right park-bench position. After opening the dura and cerebellopontine angle, the arachnoid cyst was exposed. The arachnoid cyst was compressing the flattened lower cranial nerves at the right jugular fossa. Her symptoms resolved postoperatively. Two months after the operation, she was completely free from her previous symptoms.

• Journal of Korean Neurosurgical Society
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• 제30권7호
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• pp.928-933
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• 2001

Intraventricular arachnoid cyst has been rarely reported. Here we present two cases of symptomatic intraventricular arachnoid cysts in the fourth ventricle and right lateral ventricle. The first patient was a 38-year-old female who complained of headache and left facial hypesthesia. Computed tomography and MR scan revealed large cystic lesion in the fourth ventricle. After cyst wall removal, facial hypesthesia disappeared immediately and headache improved slowly. The second patient was a 9-year-old girl who complained of headache, vomiting and paresthesia in her right low extremity. Cystic lesion in the right lateral ventricle was detected in the CT and MR scan. The symptoms improved after cyst wall removal. Surgical findings of these two cases showed that the cyst walls were attached firmly to the choroid plexus. Symptomatic intraventricular arachnoid cyst must be treated appropriately and we recommend complete cyst wall removal.

• Investigative Magnetic Resonance Imaging
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• 제21권3호
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• pp.192-194
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• 2017

Giant arachnoid granulations have been reported to be associated with headaches, which can be acute or chronic in presentation. In some cases, idiopathic intracranial hypertension, previously called pseudotumor cerebri, may occur. The pathophysiology of these enlarged structures seen as filling defects on imaging is not clearly defined, although they are presumed to cause symptoms such as headache via pressure resulting from secondary venous sinus obstruction. We present a unique presentation of secondary headache in a 39-year-old man with no prior history of headaches found to have giant arachnoid granulations, presenting as migraine with aura.

• Journal of Korean Neurosurgical Society
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• 제43권1호
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• pp.54-56
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• 2008

We report a case of a patient with an arachnoid cyst in which subdural hematoma and intracystic hemorrhage developed spontaneously. Usually, arachnoid cysts are asymptomatic, but can become symptomatic because of cyst enlargement or hemorrhage, often after mild head trauma. Although they are sometimes combined with subdural hematoma, intracystic hemorrhage has rarely been observed. Our patient had a simultaneous subdural hematoma and intracystic hemorrhage without evidence of head trauma.

• Journal of Korean Neurosurgical Society
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• 제43권1호
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• pp.48-50
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• 2008

We experienced a case of giant arachnoid granulation misdiagnosed as dural sinus thrombosis. A 66-year-old woman presented with a one month history of progressive occipital headache. Computed tomography angiography and cerebral angiography showed a round filling defect at the transverse sinus which was speculated as a transverse sinus thrombosis. Anticoagulation therapy was performed to prevent worsening of thrombosis for 2 weeks and then a Gadolinium-enhanced magnetic resonance imaging scan was performed. The filling defect lesion at the transverse sinus revealed a non-enhancing granule with central linear enhancement, which was compatible with giant arachnoid granulation. We checked the intrasinus pressure difference across the lesion the through the dural sinus in order to exclude the lesion as the cause of headache. Normal venous pressure with no significant differential pressure across the lesion was noted. Headache was treated with medical therapy.